Merge tag 'imx-soc-3.15' of git://git.linaro.org/people/shawnguo/linux-2.6 into next/soc

i.MX SoC changes for 3.15 from Shawn Guo:
 - Support suspend from ocram (DDR IO floating) for imx6 platforms
 - Add cpuidle support for imx6sl
 - Sparse warning fixes for imx6sl and vf610 clock code
 - Remove PWM platform code
 - Support ptp and rmii clock from pad
 - Support WEIM CS GPR configuration
 - Random cleanups and defconfig updates

* tag 'imx-soc-3.15' of git://git.linaro.org/people/shawnguo/linux-2.6: (373 commits)
  ARM: imx6: drop .text.head section annotation from headsmp.S
  ARM: imx6: build suspend-imx6.o with CONFIG_SOC_IMX6
  ARM: imx6: rename pm-imx6q.c to pm-imx6.c
  ARM: imx6: introduce CONFIG_SOC_IMX6 for i.MX6 common stuff
  ARM: imx6: do not call imx6q_suspend_init() with !CONFIG_SUSPEND
  ARM: imx6: call suspend_set_ops() from suspend routine
  ARM: imx6: build headsmp.o only on CONFIG_SMP
  ARM: imx6: move v7_cpu_resume() into suspend-imx6.S
  ARM i.MX6q: Mark VPU and IPU AXI transfers as cacheable, increase IPU priority
  ARM: imx6q: Add GPR6 and GPR7 register definitions for iomuxc gpr
  bus: imx-weim: support CS GPR configuration
  ARM: mach-imx: Kconfig: Remove IMX_HAVE_PLATFORM_IMX2_WDT from SOC_IMX53
  ARM: imx_v6_v7_defconfig: Select CONFIG_DEBUG_FS
  ARM: mach-imx: Select CONFIG_SRAM at ARCH_MXC level
  ARM: imx: add speed grading check for i.mx6 soc
  ARM: imx: avoid calling clk APIs in idle thread which may cause schedule
  ARM: imx6q: support ptp and rmii clock from pad
  ARM: imx6q: remove unneeded clk lookups
  ARM: imx_v6_v7_defconfig: Select CONFIG_MMC_UNSAFE_RESUME
  ARM: imx_v4_v5_defconfig: Select CONFIG_MMC_UNSAFE_RESUME
  ...

1 files changed, 22 insertions, 4 deletions

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 47b858fc50b2..7ae0c4d51741 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -238,6 +238,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 	int			port;
 	int			mask;
 	int			changed;
+	bool			fs_idle_delay;
 
 	ehci_dbg(ehci, "suspend root hub\n");
 
@@ -272,6 +273,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 	ehci->bus_suspended = 0;
 	ehci->owned_ports = 0;
 	changed = 0;
+	fs_idle_delay = false;
 	port = HCS_N_PORTS(ehci->hcs_params);
 	while (port--) {
 		u32 __iomem	*reg = &ehci->regs->port_status [port];
@@ -300,16 +302,32 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 		}
 
 		if (t1 != t2) {
+			/*
+			 * On some controllers, Wake-On-Disconnect will
+			 * generate false wakeup signals until the bus
+			 * switches over to full-speed idle.  For their
+			 * sake, add a delay if we need one.
+			 */
+			if ((t2 & PORT_WKDISC_E) &&
+					ehci_port_speed(ehci, t2) ==
+						USB_PORT_STAT_HIGH_SPEED)
+				fs_idle_delay = true;
 			ehci_writel(ehci, t2, reg);
 			changed = 1;
 		}
 	}
+	spin_unlock_irq(&ehci->lock);
+
+	if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
+		/*
+		 * Wait for HCD to enter low-power mode or for the bus
+		 * to switch to full-speed idle.
+		 */
+		usleep_range(5000, 5500);
+	}
 
 	if (changed && ehci->has_tdi_phy_lpm) {
-		spin_unlock_irq(&ehci->lock);
-		msleep(5);	/* 5 ms for HCD to enter low-power mode */
 		spin_lock_irq(&ehci->lock);
-
 		port = HCS_N_PORTS(ehci->hcs_params);
 		while (port--) {
 			u32 __iomem	*hostpc_reg = &ehci->regs->hostpc[port];
@@ -322,8 +340,8 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
 					port, (t3 & HOSTPC_PHCD) ?
 					"succeeded" : "failed");
 		}
+		spin_unlock_irq(&ehci->lock);
 	}
-	spin_unlock_irq(&ehci->lock);
 
 	/* Apparently some devices need a >= 1-uframe delay here */
 	if (ehci->bus_suspended)